Subsidiary Guarantors - Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Accounts receivable, net	$ 29,207			$ 51,073
Accrued revenue	281,177			474,827
Derivative instruments	411,774			245,263
Other current assets	7,342			35,450
Total current assets	729,500			806,613
Unproved properties	1,406,464			1,767,600
Proved properties	11,568,285			12,705,672
Water handling and treatment systems				1,013,818
Gathering systems and facilities	5,802			2,470,708
Other property and equipment	70,965			65,842
Property and equipment, gross	13,051,516			18,023,640
Less accumulated depletion, depreciation, and amortization	(3,136,767)			(4,153,725)
Property and equipment, net	9,914,749			13,869,915
Operating leases right-of-use assets	3,230,148
Derivative instruments	405,180			362,169
Investment in consolidated affiliates	1,819,323			433,642
Investments in unconsolidated affiliates	1,819,323			433,642
Other assets	21,388			47,125
Total assets	16,120,288			15,519,464	$ 15,802,535
Liabilities and Stockholders' Equity
Accounts payable	32,496			66,289
Accounts payable, related parties	100,437
Accrued liabilities	392,726			465,070
Revenue distributions payable	231,152			310,827
Derivative instruments				532
Short-term lease liabilities	409,990			2,459
Other current liabilities	4,367			8,363
Total current liabilities	1,171,168			853,540
Long-term debt	3,703,828			5,461,688
Deferred income tax liability	916,031			650,788
Long-term lease liabilities	2,823,197			2,873
Other liabilities	59,366			63,098
Total liabilities	8,673,590			7,031,987
Common stock	3,041			3,086
Additional paid-in capital	6,124,042			6,485,174
Accumulated earnings	1,319,615			1,177,548
Total stockholders' equity	7,446,698			7,665,808
Noncontrolling interests in consolidated subsidiary				821,669
Total equity	7,446,698	$ 8,339,700	$ 8,292,798	8,487,477	$ 8,671,152	$ 8,802,911	$ 8,921,098	$ 8,876,136
Total liabilities and equity	16,120,288			15,519,464
Reportable legal entity
Liabilities and Stockholders' Equity
Long-term debt	3,703,828			3,829,541
Reportable legal entity | Parent (Antero)
Current assets:
Accounts receivable, net	29,207			49,529
Intercompany receivables				383
Accrued revenue	281,177			474,827
Derivative instruments	411,774			245,263
Other current assets	7,342			13,937
Total current assets	729,500			783,939
Unproved properties	1,406,464			1,767,600
Proved properties	11,568,285			13,306,585
Gathering systems and facilities	5,802			17,825
Other property and equipment	70,965			65,770
Property and equipment, gross	13,051,516			15,157,780
Less accumulated depletion, depreciation, and amortization	(3,136,767)			(3,654,392)
Property and equipment, net	9,914,749			11,503,388
Operating leases right-of-use assets	3,230,148
Derivative instruments	405,180			362,169
Investment in consolidated affiliates	1,337,849			(740,031)
Contingent acquisition consideration				114,995
Investments in unconsolidated affiliates	481,474
Other assets	21,388			31,200
Total assets	16,120,288			12,055,660
Liabilities and Stockholders' Equity
Accounts payable	32,496			44,917
Accounts payable, related parties	300,774
Intercompany payable				111,620
Accrued liabilities	392,726			392,949
Revenue distributions payable	231,152			310,827
Derivative instruments				532
Short-term lease liabilities	409,990			2,459
Other current liabilities	4,367			2,162
Total current liabilities	1,371,505			865,466
Long-term debt	3,703,828			3,829,541
Deferred income tax liability	916,031			650,788
Long-term lease liabilities	2,823,197			2,873
Other liabilities	59,366			55,017
Total liabilities	8,873,927			5,403,685
Common stock	3,041			3,086
Additional paid-in capital	6,124,042			5,471,341
Accumulated earnings	1,119,278			1,177,548
Total stockholders' equity				6,651,975
Total equity	7,246,361			6,651,975
Total liabilities and equity	16,120,288			12,055,660
Reportable legal entity | Guarantor Subsidiaries
Current assets:
Intercompany receivables	131,135
Total current assets	131,135
Investments in unconsolidated affiliates	1,337,849
Total assets	1,468,984
Liabilities and Stockholders' Equity
Additional paid-in capital	1,337,849
Accumulated earnings	131,135
Total equity	1,468,984
Total liabilities and equity	1,468,984
Reportable legal entity | Non-Guarantor Subsidiaries
Current assets:
Accounts receivable, net				1,544
Intercompany receivables				115,378
Other current assets				21,513
Total current assets				138,435
Water handling and treatment systems				1,004,793
Gathering systems and facilities				2,452,883
Other property and equipment				72
Property and equipment, gross				3,457,748
Less accumulated depletion, depreciation, and amortization				(499,333)
Property and equipment, net				2,958,415
Investments in unconsolidated affiliates				433,642
Other assets				15,925
Total assets				3,546,417
Liabilities and Stockholders' Equity
Accounts payable				21,372
Intercompany payable				4,141
Accrued liabilities				72,121
Other current liabilities				2,052
Total current liabilities				99,686
Long-term debt				1,632,147
Contingent acquisition consideration				114,995
Other liabilities				8,081
Total liabilities				1,854,909
Partners' capital				1,691,508
Total stockholders' equity				1,691,508
Total equity				1,691,508
Total liabilities and equity				3,546,417
Eliminations
Current assets:
Intercompany receivables	(131,135)			(115,761)
Total current assets	(131,135)			(115,761)
Proved properties				(600,913)
Water handling and treatment systems				9,025
Property and equipment, gross				(591,888)
Property and equipment, net				(591,888)
Investment in consolidated affiliates	(1,337,849)			740,031
Contingent acquisition consideration				(114,995)
Total assets	(1,468,984)			(82,613)
Liabilities and Stockholders' Equity
Accounts payable, related parties	(200,337)
Intercompany payable				(115,761)
Other current liabilities				4,149
Total current liabilities	(200,337)			(111,612)
Contingent acquisition consideration				(114,995)
Total liabilities	(200,337)			(226,607)
Partners' capital				(1,691,508)
Additional paid-in capital	(1,337,849)			1,013,833
Accumulated earnings	69,202
Total stockholders' equity				(677,675)
Noncontrolling interests in consolidated subsidiary				821,669
Total equity	(1,268,647)			143,994
Total liabilities and equity	$ (1,468,984)			$ (82,613)